SPHAERULINA 219 



C. Spores hyaline. More than \-septate 



CALOSPORA (SACC.) 



Stroma sunk in the host, pustulate; asci normally 8-spored; 

 spores elongated, 2-many-septate, hyaline, with or without 

 appendages ; paraphyses present. 



Vanilla disease. A consignment of diseased vanilla plants 

 ( Vanilla planifolta, Andr.) was received at Kew for examina- 

 tion, accompanied by a report stating that the vanilla industry 

 in the Seychelles was threatened, owing to the somewhat 

 sudden and widespread occurrence of a disease suspected to 

 be due to a fungus. Examination showed that the disease 

 was in reality caused by a fungus, which being undescribed, 

 was called Calospora vanittae (Mass.). A conidial condition 

 of the fungus, agreeing in character with the form -genus 

 (Hainesid), formed minute, dull-red or amber-coloured, sub- 

 tremelloid specks in groups, on slightly discoloured patches 

 on the living leaves and stem. A second conidial stage 

 followed on the same spots, and finally when the host was 

 quite dead, the ascigerous condition appeared. 



The same fungus, showing all three stages of fruit, was sent 

 to Kew at a later date, from Antigua and New Granada, 

 attacking the same species of vanilla. 



Hainesia form. Dull red or amber-coloured, gelatinous 

 specks, conidia almost hyaline, continuous, 9- TO X 3-5-4 p. 



Cytospora form. Perithecia globose, conidia hyaline, ellip- 

 tical, continuous, 14-16x6-7 /x. 



Ascigerous form. Perithecia subglobose, narrowed above 

 into a neck, asci cylindric-clavate, 90-100 x 12-14 P* 8-spored, 

 spores elliptical, 3-septate, hyaline, 15-16x5 /x, paraphyses 

 slender. 



Clearing away and burning all diseased plants, which had 

 been allowed to lie and rot on the ground, suppressed the 

 disease, which was stated to be most prevalent in low, badly 

 drained districts. 



Massee, Kew Bull., June 1892. 



SPHAERULINA (SACC.) 



Perithecia immersed, spores escaping through a short 

 protruding mouth. Asci 8 - spored, paraphyses absent. 

 Spores elongated, hyaline, 3-many-septate. 



